This study was designed to investigate the effect of bleaching on the bond strength of ceramic laminate veneers using two adhesive resin cements (rely x ultimate and variolink N ) as well as, the time elapsed between bleaching and bonding on the shear bond strength of laminate veneers bonded to bleached enamel. Thirty recently extracted maxillary central incisors (free of caries, fracture, or cracks) were selected, teeth were prepared to accommodate E max veneer discs of equal thickness .IPS e.max ingots were used to fabricate 30 ceramic discs with standardized dimensions following the manufacturer’s recommendations. (5mm diameter x 1 mm thickness.)Samples grouping:-The E max discs were divided into 6 groups according to the time elapsed between bleaching and bonding (Table 2 :)*Group1 ( n=5 ): in which E max discs were bonded to the prepared ( non-bleached ) tooth surface by using Variolink N resin cement.*Group 2 (n=5): in which E max discs were bonded to the prepared ( non-bleached ) tooth surface by using Rely X Ultimate resin cement.* Group 3 ( n=5) : in which E max discs were bonded to the prepared ( bleached ) tooth surface immediately after bleaching by using Variolink N resin cement.* Group 4 ( n=5) : in which E max discs were bonded to the prepared ( bleached ) tooth surface immediately after bleaching by using Rely X Ultimate resin cement.* Group 5 (n=5) : in which E max discs were bonded to the prepared ( bleached ) tooth surface 2 weeks after bleaching by using Variolink N resin cement.* Group 6 (n=5) : in which E max discs were bonded to the prepared ( bleached ) tooth surface 2 weeks after bleaching by using Rely X Ultimate resin cement.All samples were tested using a universal testing machineat cross-head speed of 0.5 mm/min until failure. The force required to fracture each crown was measured in Newton's. Data were collected, Tabulated and statistically analyzed.Regarding to the effect of bleaching on the bond strength, it was found that non-bleached groups (group 1, 2) record statistically significant higher shear bond strength than bleached groups (groups 3, 4, 5, 6. )Regarding to the effect of time interval between bleaching and bonding , it was found that teeth bonded to veneers after 2 weeks from the bleaching procedure as in groups (group 5 , 6 ) recorded higher shear bond strength value than that bonded to veneers immediately after bleaching procedure as in groups ( group 3 , 4.))Regarding to the effect of cements type ; it was found that groups ( 2 , 4, 6 ) that were cemented by dual cure Rely X Ultimate resin cement showed higher shear bond strength values than those ( groups 1 , 3 , 5 ) that was cemented by light cure Variolink N resin cement